For Laboratory & Research Use Only — Not for Human or Veterinary Use
United Peptides
Research peptides · Made and tested in the USA

One standard,
printed on every lot.

Forty-plus compounds synthesized in the United States and released at 99% or higher purity by HPLC and mass spectrometry. Third-party tested. The vial carries a lot number, and the lot number carries its own Certificate of Analysis.

Third-party tested · U.S. fulfillment · Plain, discreet packaging

Every lot is released this way. Look up yours for the actual values.

Every lot is released this way. Look up yours for the actual values.

Lot-matched COA on every vial
Release pipeline

Seven checkpoints between synthesis and shipment.

A lot moves forward only when the prior result is on file. The certificate is the last step, not the first claim.

01

Synthesis

Solid-phase assembly of the named sequence.

02

HPLC purity

Chromatographic assay, released at 99% or higher.

03

Mass-spec identity

Molecular weight confirmed against the reference.

04

Endotoxin

Screened for bacterial endotoxin load.

05

Sterility

Filled and sealed under controlled conditions.

06

Heavy metals

Elemental impurity panel on the finished lot.

07

COA issued

Results bound to the lot number on the vial.

United Peptides

One standard. Every vial.

The document

What a United COA reports.

A certificate is only useful if it covers the things that can go wrong. Here is the panel we publish, against what a research buyer is commonly handed.

Certificate of Analysis contents by line item
Line itemUnited PeptidesTypical vendor
HPLC purityAssayed value printed, not a range
MS identityMolecular weight against the reference
EndotoxinBacterial endotoxin result on the lot
SterilityFill and seal verification
Heavy metalsElemental impurity panel
Batch consistencySame panel repeated lot to lot
Public lot lookupEnter the vial number, read the file

Purity of 99% or higher by HPLC and mass spectrometry. Third-party tested. Lot-matched Certificate of Analysis. Made in the USA. For laboratory research use only, not for human or veterinary use.

Lot lookup

Read the file before you open the vial.

The lot number is printed on the label. Enter it and the matching certificate comes back. No account, no request form.

Cannot find the number? It sits under the compound name on the vial label.

United PeptidesSample

Certificate of Analysis

Specimen layout. Values below are placeholders for illustration only.

Compound
Sample compound
Lot
UP-SAMPLE-0000
Purity by HPLC
99.4% (sample value)
Identity by MS
Confirmed against reference (sample)
Endotoxin
Within limit (sample)
Sterility
Pass (sample)
Issued
Sample document, no issue date

Not a released result. Every shipped lot carries its own certificate, matched to the number on the vial.

Multi-vial sets

Sets priced below the parts.

All bundles
Answers

Before you order.

Anything not covered here, write to us and a person answers.

Email support

Everything in this catalog is supplied strictly for laboratory and research use only. These products are not drugs, foods, supplements or cosmetics, are not approved by the FDA, and are not intended to diagnose, treat, cure or prevent any disease, or for human or veterinary use. We do not publish dosing guidance and we do not give medical advice.